function playWithDog($dog) {
    // Dog's initial excitement level affects everything!
    let excitementLevel = $dog.data('excitement') || 50;
    
    // Dogs get more excited when you show them a toy
    function showToy(toyType) {
        const toyMultiplier = {
            'ball': 2,
            'frisbee': 1.8,
            'stick': 1.3,
            'squeakyToy': 2.5
        };
        
        excitementLevel *= toyMultiplier[toyType];
        
        // Tail wagging intensity correlates with excitement
        $dog.find('.tail').animate({
            transform: `rotate(${Math.min(excitementLevel, 360)}deg)`
        }, {
            duration: 200,
            easing: 'swing',
            complete: function() {
                // Dogs can't contain themselves after a certain excitement threshold
                if (excitementLevel > 100) {
                    zoomies();
                }
            }
        });
    }
    
    // The legendary zoomies - running in random patterns
    function zoomies() {
        const positions = generateRandomPositions(10);
        let zoomieInterval;
        
        zoomieInterval = setInterval(() => {
            if (excitementLevel < 70) {
                clearInterval(zoomieInterval);
                needsBelly.rubs = true;
                return;
            }
            
            // Move rapidly between random positions
            positions.forEach(pos => {
                $dog.animate({
                    left: pos.x,
                    top: pos.y
                }, {
                    duration: 300,
                    easing: 'linear'
                });
            });
            
            excitementLevel *= 0.9; // Gradually tire out
        }, 500);
    }
    
    // Every dog needs belly rubs
    function giveBellyRubs() {
        $dog.addClass('happy-rolls')
            .on('click', function() {
                const contentment = Math.min(excitementLevel * 0.5, 100);
                
                $(this).find('.tongue').css({
                    'transform': 'translateY(20px)',
                    'opacity': contentment / 100
                });
                
                // Sometimes the leg starts kicking
                if (contentment > 80) {
                    $(this).find('.back-leg').addClass('scratching');
                }
            });
    }
    
    // Dogs remember who gives them treats
    function giveTreat(treatType) {
        const treatValue = {
            'basic': 10,
            'bacon': 25,
            'peanutButter': 30,
            'cheese': 35
        };
        
        $dog.data('loyalty', ($dog.data('loyalty') || 0) + treatValue[treatType]);
        
        // More treats = more tricks learned
        if ($dog.data('loyalty') > 100) {
            unlockNewTrick();
        }
    }
    
    // The more you play, the more tricks they learn
    function unlockNewTrick() {
        const availableTricks = [
            'sit',
            'stay',
            'rollOver',
            'shake',
            'speak',
            'playDead'
        ];
        
        const knownTricks = $dog.data('tricks') || [];
        const newTricks = availableTricks.filter(trick => !knownTricks.includes(trick));
        
        if (newTricks.length) {
            const learnedTrick = newTricks[Math.floor(Math.random() * newTricks.length)];
            knownTricks.push(learnedTrick);
            $dog.data('tricks', knownTricks);
            
            // Dogs are extra happy when they learn something new
            excitementLevel += 20;
        }
    }
    
    // Initial play session setup
    $dog.on('playtime', function() {
        showToy('ball');
        setTimeout(giveBellyRubs, 5000);
        setInterval(() => giveTreat('basic'), 10000);
    });
    
    // Start the fun!
    $dog.trigger('playtime');
}